67% (2009)

64% (2000)

63% (2010)

59% (2012)

69% (2012)

63% (2002)

64% (2008)

66% (1999)

58% (2000)

70% (2000)

57% (1997)

57% (2008)

70% (1998)

66% (2002)

64% (1999)

65% (1997)

63% (1998)

60% (2004)

63% (1999)

60% (2008)